Gas-compressor.



PATENTED AUG. 6, 1907.

R. OLKLATTE. GAS COMPRESSOR. APPLICATION FILED 0OT.21, 1903- res-seams.

ROBERTOSCAR KLATTE, OF HA constru ts son].

Application filed October 21, 1903. Siei'ial llo. 177,972.

To all 'wiiom'it may concern:

'Be it lr'nown'that LRonnivr OSCAJR KtATTE, a subthe German Empire, (whose post-office address is 93 Fruchtallej have invented certain new and useful 'I'inprovements in Gas-Compressors, of which the fol lowing is a specific ation.

My invention relates to gas compressors, and has for its object to produce an apparatus of this character in which the back-pressure in the delivery main will antmnatically vent the pressure gas through a valve f from the pressure side of the apparatus to the suction chest and suction and delivery unions thereon. Fig. 4 is a horizontal section on line II-11 Fig. 3. Fig. 5 shows in detail a somewhat modified form or the rockshait shown in Fig. Land Fig. 6 illustrates a modifica- 'tion of valve with ineansto loadit.

The apparatus in order to be of small size has all its parts mounted on a single support, and to this end I use a hollow metallic frame, a, containing the suction chamber, surmounted by'a second hollow frame or casing 5 that contains the.comprcssionchamber.

Mounted on the top of the casing b and at.one side 7 thereof is the gas compressor or rotary pump 0 belted by the belt 6 to an electric motor (I that is alsh mounted on the top casing b; ,The section a of the casing con- I tains a suctionchamber, to which the gas is led, first through a gas meter, the gas comingdircctly from the produceror a storage gasometer as the case may be. The valve is contained, preferably, but not necessarily. in aseparate casting or chest secured to the outside of the casing b that contains the compression chamber.

and this casting consists of a chamber 3 having two preferably parallel depending branches '5 and 0, the

one 0 being somewhat enlarged at and slightly below the valve seat. at which portion but below the valve scnl in the upper end oi o is a. connecting member or union n. the passage through which communicates with the compression chamber in the casing b. The snclion chamber in (z is connected by a pipe r through a cock h to the suction branch 1' of the valve chest. and this branch 1' communicates on the one hand with pipe k that is connected by a pipe Z to the suction side of the compressor pump c. and on the other hand with the chamber 5: connecting the upper ends of tho Iwo )ect time German Emperor, residing at Hamburg, in

is a vertical section on an enlarged scale, the valve, valve rock-shaft u gastight in bearings t, t.

branches i and o, as clearly seen in Figs. 1 and 3. The parts to s and7i are formed of a single casting, readily removable ironi the device. The delivery side of the pump is connected by pipe m with the compression chamber in the casing whence it passesthrough the connecting member or union n into the branch 0 below valve 1), thence through coeli q to the delivery or serv ice main r1 v Within the valve chest there is the valve 1) in the upper end oi the branch o of said chest. closing communication between the upper cnd of this branch and the chamber 5'. The chamber .5- connects the upper ends of thebranches o and i, and in common with the latter communicatcs with pipe is leading to the suction side of the pump. The valve p. shown in Fig. 3. is

this rock-shaft out-side of the valve chest secured a lever arm 10 carrying a weight ucapable of adjustment. along the arm to change the load on the valve. and inside thovalve chest this roe -shait carries an arm (E, the free end oi this arm having a ball head 1:, antiiriction roller, 01' the like device, engagin in a suitably shaped notch 3 in the valve stem p, so that the up and down movements of the valve p, due to thebach pressure in and the venting oi'the pressure ga from the main, will rock said shalt. The rock-shaft 'has an axial lubricating channel 2 from which are larcral branches supplying the bearings t, t wi h lubricant from the lubric t 2. Where high prcssurc ases are to be used-I prefer to provide the shaft z'with conical trunnions 'u and 2 0,, which are ground in their bearings. said boa ings being recessed to formcnnular chambers n, 11*. around the trunnions for the storage of lubricant. Instead of employinga weighted lcver on rock-shaft n for loading the valve, 1 directly load it by extending the valve stem p through thc top of the valve chest, providing the same witha changeable wcightr, Fig. 6. I

In order to prevent the jerking of the valvc-stom in the top of the valve chest, as well as 'to prcvcnt the escape of gas through the same, the cover is designed to form two go i fit for thopassagc of thc vnlvc stem, between which guidc-ways is an annular hambcr n" for the oil. The bearings I? and L prcvcnt tho rocking of the valve and insure the vertical movcmcut of tho sumo. l

l utilize the back-pressure not only to automatically vcnt the gas under pressure in the scrvicc niain. back to the suction side of the motor by lifting the vnlvig but also to control the "occd of the motor and tln-ro- On one end of through the pump by means of a suitable controller actuated from the valve, and this I do by securing to the r0ck-shaft it outside of the valve chest, a lever arm 1 that is connected by a link 2 to the switch-lever 3 01' an adjustable electrical resistance 4 on the switch board. 5 The switch board 5 is secured on the outside of the frame a, b oithe machine. v The greater the lift" of the valve p the greaterwillbe the extent of move' ment of the'rock-shaft u and lever-1 and'cons'equen'tly the greater will be the amount of resistanee'thrown into: themotor circuit. In consequence of this, the quantity of current supplied to the motor will be decreased and the speed of the motor will decrease accordingly. The

capacity of-the'motor and oi the cornpress or is' conse quently controlled inaccordance with the gas consumption along the service mainand' the gas-pressure cannot rise beyond a determinediamount. If-no gas is consumed themotor will be entirelystopped and" will be automatically started again as soon as the gas pressure in the service main is reduced by use by. the

consumers.

From what has been said it will be seen that by construction shown I have a small compressing appa ratus, by means 'of which the pressure in the service main is maintainedconstant, notwithstanding the teat var-'in uantities of as withdrawn from the g 8 .l a q s service main by the consumers. This pressure -is maintained by pumping the gas into the service main and utilizing .the excess of pressure, above a predetermined regulable amount, to automatically relieve the.

pressure 'in the service main by ventingit through the valve to the suction side of the pump, and at the same time utilizing the movement of this valve to out OK the supply of electricity to the motor-to reduce the speed of the motor and consequently of the pump,

therebyreduc-ing th e speed of both so as to compress the gas in'accordan'ce with the existing conditions to maintain the pressnrein the service main constant.

I It will be noted thatthe load on the valve can be changed .in accordance with the serviceconditions,

inovenien t'oi the valve, said suction and delivery brancheshaving 'connuumcailon between them above the valve, whereby excess of pressure in the cmnpression chamber and delivery branch operates said valve to automatically, ventgas into the suction pipe and simultaneously insert resistance into the motor circuit to reduceits speed,' sub-- stantinlly as described.

'2. '.l.he' combination with a suitable casingconitaining a compression chamber, a compressor and an; electric inotor to drivethe latter, of a valve cbest having a delivery branch, a union connecting said branch with" the compression chamber, a service pipe connected to'said'branenand having direct communication through the branch .'a'nd union with thecompression chamber, a suction branch on.

the valve chest communicating with the compressor,' a

pressure actuated lift valve in the upper end of the delivery branch, an arm within thechest operated by 'the valve, a'chaniben connecting the two branches above the valve, a rod outside of the chest connected with the arm, and means to variably load said rod against oscillation wherebyexcess of pressure in the compresslonichamber and delivery branch will operate-saidvalve to vent gas intothe suction.

pipe, substantially as described. I 3; The combination with a casingcontaining a compression chamber, 21'- compressor and a"motor to drive the.

.latter,.of a valve eh'eston'the casing having parallel suction: and delivery branches connected together a pressure actuated lift valve in the' chest in the end of the delivery branch, saiddelivery bra'nelrhaving pressure gas inlet hclewihe valve, controlling mechanism for the motor nred'on'the casing and connected to the valve, whereby of pressnre in the coinpressionchamber and delivery, cil will lift said vnlve to vent compressed gas into the suction brunch and simultaneously operate the controlling mechanism.

-l. The combination with a suction chamber, a compression chamber, a compressor and a motor to drive the latter.

of a valve-chest outside of the chambers having a suction branch and a delivery branch communicating respectively with the-suction chamber and compression chamber, said branches connected by a chamber which communicates with the suction side of the. compressor. means connecting the pressure. side of the compressor with the compression chamber, a pressure actuated valve in the deliver-y branch chamber, and controllingmechanism for the motor 011-- erai'ed by the valve. i

5. The combination with a suction chamber. 'a compression chamber. acomprcssor and a motor to drive the latter, of a valve-chest outside'oi the chambers having a suction branch and a delivery branch communicating respectively with the suction chamber and compression chamber. said branches-connected by a chamber which communicates witlrtliesuctiun side of the compressor,- means connecting .the'pressure side of the compressor with the compression chamber. a pressure actuated valve in the-delivery branchabove the point of communication with the compression chamber, a leverpivotally mounted on the chest, means controlled by the valve to oscillate the lever, a variable resistance for the motor circuit and a switch arm connected to the lever adapted to be movedtherelw over the resistance.

llOl iEll'l OSCAR KLA'r'li-l.

Witnesses above the point of communication with the compression 

